Alaem device



S: M. EISNER.

I ALARM DEVICE.

I APPLlCATION FILED OCT. I, 19191 372 7 Pawnted Mar. 32:1-9, 1921.

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UNITED STATES SAMUEL JUL. EISNER. 0F NEWARK.

N EW JERSEY.

ALARM DEVICE.

Application mid October 7,

T all 1/: from. it 'HIUj/ concern Be it known that l, haurnl. M.ElHNl-ZR, a citizen of the l nited States. and a resident of Newark,county of Essex, and State of New Jersey. have invented certain new anduseful lmprovemrnts in Alarm Devices. of which the following: is aspecification.

This invention relates to an alarm device to prcveht the theft oiautomobiles, and it is dcsrlillcd as being applied to automobiles,although it will be understood that it is adapted for otherapplications.

The invention consists of a device to be placed in the electricalcircuits of an automobile, and having a switch mechanism for theignition system and also having an alarm circuit the invention comprisima device for locking or releasing the. switch arm at wiil and alsoactuating a, make-and-break device so that, according to the position ofthe lock, the ignition system is operative or the alarm circuit is madeoperative. When the. alarm circuit. is made, the ignition is broken, andneither the alarm circuit nor-the ignition circuit can. he changed fromthis status without the positive operation of the. lock. 3

The invention is illustrated in the accom pauying drawing, in whichFigure 1 is a back view of the casing, with the back removed, showingthe mechanism within the' switch box, and Fig. 2 is a section on line 2-in Fig. 1. Fig. 3'is a detail view showing a modified manner of wiring.

in the drawing 10 indicates, in general, the terminal of the ignitionsystem, which is grounded and is usually the spark plug in the cylinder,the wires 11 and 12, connected by the switch 13, leading, to the switchbox, and the second wire 14 leading to a source of electrical energy,such as a storage buttery l5,'which is also grounded, and when thecircuit is closed, it makes ignition posihle, in the engine. i

The alarm circuit comprises a wire 16in circuit with an alarm device'17, this device being also grounded, usually to the body of the, vchitand the other wire. 18 being conne ted, in. be case. of'l ord or similarcars, ton dry battery 1!). In other instances where the dry batteriesare not used, a wire 20 conl'lccts the terminals 27 and 29 and in thisway the storage battery 15 is adapted to energize both circuits.

The casing 21. is suitably disposed, usually on the dashboard of thevehicle, and

Specification of Letters Patent.

"to swing, in the ener ized, the latch Patented Mar. 29. I921.

1919. Serial No. 329.018.

contains a switch arm 22 which is adapted manner shown being: mounted ona pivot .23 and having; one end 14 seeured to a spring; 25. which has atendency to pull the switch arm in one direction.

he wires 1'2 and H are connected to the. terminals 24') and 27. and thewires 16 and H are connected to the terminals 28 and 2f), the switch armhaving. its end 30 arranged to cont-net with these terminals and connectthem electrically. The end I'll of the switch arm is held against actionby the spring 25 by means of a latch 32. which is normally held inposition by a yielding means, such as a spring 33, and the latch 32 hasa nose 34 which engages the under side of the end 31 of theswiteh arm tohold it up.

suitable lock 35 is mounted in the casing and is of any desired type,being operated by a key 36 and having on the inner end a lock piece 37,which is preferably made of fiber or similar material and is operated bymeans of the key, and having its outer end adapted to'engage either theunder side of the end 31 of the switch arm, or to be moved to engage aplate 38 of a. make-and-break device within the circuit comprising aconnection 39 From the terminal 40 to the contact 41,- the plate 38being connected by a wire 42 to a magnet 43, which magnet adopted tooperate onthe latch 32, the magnet, in turn,

being grounded through the wire 44 50 as to complete the circuit. l

The switch 13 is usually a starting switch, that is, it is thrown onwhen a. driver is to. start his cur,und when the device is locked, asshown in Fig. 1, when the switch 1 3 is thrown on, the current can passthrou h'thc battery .15 into the ignition system in wanted at 10 and themachine is in eonditionto be started. If, however,

the operator has 1nlocked the device, so that the lock pieeeffi? ishorizontal, the plate 38 break device has been contact 31, by means ofthe switch 13, the make-andforceda ainst the and if the circuit is ttown on.

of the make-and break device is closed and the ma 'net 43 is 32 ispulled bac and the switc arm is operated by the springi25, which causesthe end 30 of the switch arm to engage the terminals 28 and 29, whichconnects u is soundct and, continues to sound, even if the. switch 13 isopen,

as the opening; of the switch 13 in no way afiectsthe operatlon of theswitch arm 22, and the device will conthe alarm circuit andthe alarm noi tinue to sound until the lock piece 37 is turned. When the lock piece37 is turned, the make-andJn-eak device 3 is opened and the lock pieceacts as a setting device to re establish the switch arm in its normalposition. where it is again engaged and held up by the latch 32. 7

It will be evident from this description that on the sounding of thealarm, the switch arm is disconnected from theicontacts that are partofthe ignition circuit, and in the absence of a complete ignitioncircuit it would be impossible, while the alarm is sounding. to startthe engine.

1 claim:

An alarm device comprisin r a switch mechanism including terminals i ortwo separate circuits, a movable switch member, a latch normally holdingthe switch member in position to contact with the terminals of onecircuit, a magnet for releasing the latch to permit the switch to closethe other circuit. a make and break device in the magnet circuit, andlockable means movable from a position in which it closes the magnetcircuit at the make and break device and is out of the path of movementof said switch member to an alternative position in which the switchmember is in latching position and the mngnet'circuit is open.

In testimony that I claim the foregoing, I have hereto set my hand. this29th day of September. 1919.

SAMUEL M. EISNER'

